Genotoxicity assessment in two Amazonian estuaries using the Plagioscion squamosissimus as a biomonitor

Abstract

Genotoxicity studies in coastal ecosystems have been a priority in Environmental Risk Assessment (ERA). This research aimed to study the genotoxicity by the micronucleus test and comet assay in two Brazilian Amazon estuaries (anthropized and control) using Plagioscion squamosissimus as a biomonitor. Blood samples were collected from 54 specimens. No significant genotoxic effects were detected in the cells analyzed, although the highest occurrence (MN and DNA damages) was observed in anthropized site. The percentage of genomic damage differed between the sites studied, being always higher in anthropizes site as well. Of the nucleoids analyzed in this site, on average, 28 ± 14.42% of the cells were classified in the highest damage class. The fish analyzed in the present study are direct influenced of xenobiont agents capable of producing damage to the genetic material of aquatic organisms in both sites and, consequently, may bring consequences still little reported in studies of morphophysiological alterations in humans.

Effects of the hydrodynamics of Guamá river estuary on the dispersion of organic load in Tucunduba Igarapé, Belém, Pará (Brazil) State

“…Despite the acidic values, it was observed that the pH was within the acceptable value for aquatic environments described by Hasan et al (2022): pH less than 7 but greater than 8.5 is not ideal for productivity, and less than 4 is considered harmful to aquatic life. Waters from the estuaries of the State of Pará has acidic pH values and is related to the local geology (Oliveira et al, 2022;Santos et al, 2020;Varela et al, 2020).…”

Monitoring of Mycotoxigenic Fungi in Fish Farm Water and Fumonisins in Feeds for Farmed Colossoma macropomum

“…One way to verify the ecotoxicological risk in aquatic ecosystems is to analyze anomalies in the blood of fish and amphibians, because they are considered excellent environmental bioindicators because they are highly sensitive to the quality of the environment, such as water quality [ 16 , 17 ]. The skin of these animals is thin and rich in blood vessels, and it is through it that amphibians interact with the environment.…”